Wrinkle flexible material with rubber solution coating



Patented May 3, 1949 UNITED STATES PATENT.OFFICE WBINKLE FLEXIBLE MAT ERIALWITH RUBBER. SOLUTION COATING Nathan '1. Beynon, Dayton, Ohio, anignor to New Wrinkle, Inc., tion of Delaware n, DQL, I 130ml- No Drawing. Application March 21, 1946, Serial No. 856,173

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compositions consist essentially of an alkyd resin in admixture with drier and a solvent.

Theproduction of both varnish base and alkyd base wrinkle drying coating compositions requires cooking of the components at one state or another of the process. The purpose of the present invention is to produce a new type of wrinkle drying coating composition wherein the cooking step is omitted and to utilize such compositions for the manufacture of wrinkle coated flexible materials. In other words, the coating compositions which are to be used according to the present invention are prepared by compounding the component parts theerof without the necessity ofcooking.

For this purpose, a wrinkling oil (that is to say, an oil which includes conjugated double bonds in its chemical structure) is admixed with a solution of synthetic rubber in solvent-in a ratio of from 10 parts to 50 parts of synthetic rubber (dry basis) to 100 parts of wrinkling oil.

The synthetic rubber solution may be prepared by dissolving the rubber solids in any of many solvents suitable therefor or in mixtures thereof. As indicative of solvents useable for the purpose, the following table is given:

7 however, solvents in the "Fair to good" column 2 are satisfactory in most instances. Solvents in the Diluent" column should be employed only to cut or thin solutions of synthetic rubber in solvents or mixtures of solvents in the "Excellent" and Fair to good" columns.

Including nitro aliphatic solvents retards gelling. The chlorinated solvents reduce fire and explosion hazards. The esters and ketones reduce cost and health hazards. The aromatics reduce cost, as do the petroleum hydrocarbons. The following are typical formulas, proportions being by volume:

' Per cent 1. Nitrobenzene or nitromethane 10-30 Naphtha, toluene or xylene 90-70 2. Ethylene dichloride 10-30 Naphtha, toluene or xylene 90-70 3. Chlorotoluene or chlorobenzene 10-30 Naphtha, toluene or xylene 90-70 4. Chlorobenzene 10-30 Methyl ethyl ketone 90-70 5. Nitroethane 10-30 Methyl ethyl ketone 90-70 6. Chlorotoluene 10-30 Diisopropyl ketone 90-70 '7. Chlorotoluene 10-20 Nitroethane 10-20 Naphtha, toluene or Xylene -60 8. Ethylene dichloride 10-20 Chlorobenzene 10-20 Methyl ethyl ketone 80-60 9. Butyl acetate 33% Chlorobenzene 33% Acetone 33% 10. Ethylene dichloride 10 Toluene 10 Benzene 80 11. l-nitropropane 25 Acetone 50 Benzene 25 Obviously, many other combinations may be employed successfully for the purpose.

To the resulting mixture may be added, ifjso* desired, from 40 to 80% of a pigment paste comprising for example, two-thirds pigment and onethird wrinkling oil by weight. This pigment paste is thoroughly blended into the mixture of synthetic rubber solution and wrinkling oil to produce a homogeneous composition.

To this homogeneous composition is added a quantity of solvent such as naphtha, toluene, xylene or mixtures thereof, or any other solvent such as customarily employed in varnish formulations, in quantity sufficient to produce a coating of the desired viscosity.

For example, a coating of suitable viscosity for application by spreading may consist of 40 parts by weight of synthetic rubber solids, 100 parts by weight of wrinkling oil, 60 parts by weight of pigment paste, and parts by weight of naphtha.

The use of synthetic rubber solutions in admixture with wrinkling oils for producing wrinkle drying coating composition is new in the art; in fact, it has been hitherto considered impossible to use rubber in any form, either natural or synthetic. in wrinkle drying coating compositions of any sort because the rubber acted as an inhibitor of wrinkle formation.

The texture of the wrinkle pattern obtained according to the present invention may be controlled or altered by selection of the type of synthetic rubber used. In addition, wrinkle patterns or textures hitherto unobtainable may be produced varying the amount of synthetic rubber employed in the formulation. In addition.

this new type of wrinkle drying coating composition including synthetic rubber responds to temperature variation during the initial drying or texturing period to such an extent that a great variety of textures or patterns may be obtained.

It is believed that the underlying theory governing the production of wrinkle drying coating composition including synthetic rubber is as follows:

The mixture of synthetic rubber and wrinkling oil consists of two components which are compatible with each other at the time and under the conditions of mixing and applying; however, during the drying or film-forming period these in gredients separate into distinct phases, and thereby the texture of the wrinkle pattern is altered depending on the relative proportion or ratio of the two component parts. It will be understood, of course, that this theory is offered merely in explanation of observed facts, and that it is not intended thereby to limit this invention.

The following synthetic rubbers have been used successfully in the practice of this invention:

Butadiene-styrene copolymer Butadiene-acrylonitrile copolymer Neoprene Polyvinyl chloride Any of these synthetic rubbers may be employed successfully in ratios of from 10 parts to 50 parts of rubber solids to each 100 parts of wrinkling oil, and has been so employed in the practice of this invention.

As has been noted hereinbefore, wrinkling oils are oils which include conjugated double bonds in their chemical structure. They may be native oils such as tung oil and oiticica oil, or they may be modified oils such as dehydrated castor oil (either blown or unblown) blown linseed oil and alkali isomerized oils prepared from normally non-drying oils such as peanut oil and cottonseed oil, or they may be any other type of fatty oil which includes conjugated double bonds in its chemical structure either in the native state or after treatment causing conjugation of isolated double bonds.

It has been found that wrinkle drying compositions made according to the method described above are qualified par excellence for the manufacture of wrinkle coated flexible materials. Thus. paper, fabrics, leather, cork and similar flexible materials may be successfully coated with these uncooked rubber solution-wrinkling oil mixtures, and materials are obtained thereby in which the flexibility has been retained completely or to an unusually high degree.

The compositions may be applied by spraying, spreading and rolling. The resulting film is then dried in an oven or other drying equipment known to those skilled in the art. An initial drying step at 130 1". for 30 minutes and subsequent drying at 180 F. for a period of from 30 to 60 minutes, for example, has been found to give very satisfactory results.

The rubber solution-wrinkling oil coating composition may be applied immediately to the flexible base material. However, intermediary, socalled base coats known to the art, either in one simple layer or in multiple layers, may be applied prior to using the wrinkle coating proper.

The process of making the composition per se and the product obtained thereby are covered by the assignees copending application Luaces Ser. No. 598,649, filed June 9. 1945.

It will be understood that while there have I been given herein certain specific examples of the practice of this invention, it is not intended thereby to have this invention limited to or circumscribed by the specific details of materials, proportions. or conditions herein specific, in view of the fact that this invention may be modified according to individual preference or conditions without necessarily departing from the spirit of this disclosure and the scope of the appended claims.

I claim:

1. The method of manufacturing flexible, wrinkle-coated materials comprising the steps of mixing at room temperature parts by weight of unsaturated fatty oil with varnish solvent and a solution of 40 parts by weight synthetic rubber selected from the group consisting of butadiene styrene copolymer, butadiene acrylonitrile copolymer and neoprene, applying the mixture thus obtained to a base material, and subjecting the coated material to drying at substantially F. for approximately 30 minutes and then at substantially F. for a period of from about 30 to 60 minutes.

2. The method of manufacturing flexible, wrinkle-coated materials comprising the steps of mixing at room temperature 100 parts by weight of unsaturated fatty oil with varnish solvent and a solution of from 10 to 50 parts by weight of synthetic rubber selected from the group consisting of butadiene styrene copolymer, butadiene acrylonitrile copolymer and neoprene, admixing pigment paste to the mixture, applying the mixture thus obtained to a base material. and subjecting the coated material to drying at substantially 130 F. for approximately 30 minutes and then at substantially 180 F. for a period of from about 30 to 60 minutes.

3. The method of manufacturing flexible, wrinkle-coated materials comprising the steps of mixing at room temperature 100 parts by weight of unsaturated fatty oil with varnish solvent and a solution of from 10 to 50 parts by weight of synthetic rubber selected from the group consisting of butadiene styrene copolymer, butadiene acrylonitrile copolymer and neoprene, admixing pig-,

one-third by weight of said 011, applying the mixture thus obtained to a base material, and subjecting the coated material to drying at substantially 130 F. for approximately 30 minutes and then at substantially 180 F. for a period of from about 30 to 60 minutes.

4. The method of manufacturing flexible, wrinkle-coated materials comprising the steps of mixing at room temperature 100 parts by weight of unsaturated fatty oil with varnish solvent and a solution of from 10 to 50 parts by weight of synthetic rubber selected from the group consisting of butadiene styrene copolymer, butadiene acrylonitrile copolymer and neoprene, admixing 40 to 80 parts by weight of pigment paste to the mixture, applying the mixture thus obtained to a base material, and subjecting the coated material to drying at substantially 130 F. for approximately 30 minutes and then at substantially 180 F. for a period of from about 30 to 60 minutes.

5. The method of manufacturing flexible, wrinkle-coated materials comprising the steps of mixing at room temperature 100 parts by weight of unsaturated fatty oil with varnish solvent and a solution of from 10 to 50 parts by weight of synthetic rubber selected from the group consisting of butadiene styrene copolymer. butadiene acrylonitrile copolymer and neoprene, applying the mixture thus obtained to a base material, and subjecting the coated material to drying at substantially 130 F. for approximately 30 minutes and then at substantially 180 F. for a period of from about 30 to 60 minutes.

6. The method of manufacturing flexible, .wrinisle-coated materials comprising the steps of mixing at room temperature 100 parts by weight of unsaturated fatty oil with varnish solvent and a solution of from 10 to 50 parts by weight of butadiene-styrene copolymer, applying the mixture thus obtained to a base material, and subjecting the coated material to drying at substantially 130 F. for approximately minutes and then at substantially 180 F. for a period of from about 30 to 60 minutes.

7. The method of manufacturing flexible, wrinkle-coated materials comprising the steps of mixing at room temperature 100 parts by weight of unsaturated fatty oil with varnish solvent and a solution of from 10 to parts by weight of butadiene acrylic nitrile copolymer, applying the mixture thus obtained to a base material, and subjecting the coated material to drying at substantially 130 F. for approximately 30 minutes and then at substantially 180 F. for a period of from about 30 to minutes.

8. The method of manufacturing flexible, wrinkle-coated materials comprising the steps of mixing at room temperature parts by weight of unsaturated fatty oil with varnish solvent and a solution of from 10 to 50 parts by weight of neoprene, applying the mixture thus obtained to a base material, and subjecting the coated material to drying at substantially F. for approximately 30 minutes and then at substantially F. for a period of from about 30 to 60 minutes.

NATHAN T. BEYNON.

REFERENCES crrEn The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,883,408 Root Oct. 18, 1932 1,891,079 Chitlick Dec. 13, 1932 2,078,172 Abrams et al. Apr. 20, 1937 2,295,613 Stillwell Sept. 15, 1942 

